import { type AttributeReactiveClass } from '../../element-reactive/index.js';
/**
 * shared by x-input and x-input-ng
 */
export declare class InputBaseAttributes implements InstanceType<AttributeReactiveClass<typeof HTMLElement>> {
    #private;
    static observedAttributes: string[];
    _handlerConfirmType: (this: void, newVal: string | null) => void;
    _handlerMaxlength: (this: void, newVal: string | null) => void;
    _handleReadonly: (this: void, newVal: string | null) => void;
    _handleType(value: string | null): void;
    _handleSpellCheck: (this: void, newVal: string | null) => void;
    constructor(dom: HTMLElement);
}